Method for associating a marking with an object
a marking and object technology, applied in the field of reading two-dimensional codes, can solve the problem that the marking of an object made manually or in an automated manner always shows a certain inaccuracy, and achieve the effect of exploiting this inaccuracy
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first embodiment
[0049]According to the invention, during a first step, the position of a Datamatrix code 6 present on a lateral face 4 of a glass container 2 is measured. The glass container 2 can for example be a cylindrical, flat-bottom bottle, as illustrated in [FIG. 1]. The bottom 8 of the bottle is then used as a landmark to measure the height of the Datamatrix code 6, and the revolution axis 10 of the bottle is used as a landmark to measure the inclination of said code on the bottle. Of course, these markers are mentioned by way of example and are not intended to limit the scope of the invention. Other landmark points or axes can hence be chosen, such as the bottle neck, an edge or any other distinctive feature. The height H of the Datamatrix code is evaluated by measuring the smallest distance between an arbitrarily chosen point of the Datamatrix code, in the present case point A, and the bottom 8 of the bottle. The inclination of the Datamatrix code is evaluated by measuring the angle 9 for...
second embodiment
[0055]According to an association method according to the invention, during a first step, the relative position between at least three points of a Datamatrix code 6 illustrated in [FIG. 4] is measured. According to the present example, the distance X1 between the centres of the points A and C and the distance Y1 between the centres of the points A and B are measured. During a second step, the shape of the Datamatrix code 6 is identified. Then, according to a third step, called association step, the shape of the Data matrix code is associated, in a database, to the measured distances X1 and Y1. According to an alternative embodiment, the first and second steps may be inverted or be carried out simultaneously. Of course, the shape of the Datamatrix code 6 can be associated with a higher number of distances measured between other points of the code.
[0056]The invention also relates to a second method for checking the originality of a Datamatrix code on a glass container, implementing th...
third embodiment
[0062]For that purpose, according to the invention for associating a Datamatrix code 6 with a unique glass container 2, during a first step, a light pattern is projected on the glass container 2 as a light strip 16. The light strip lights the glass container 2 is such a way that its greatest dimension is perpendicular or substantially perpendicular to the axis of rotation 10 of the glass container 2. The light strip 16 is sized in such a way as to light at least two points or two cavities of a Datamatrix code 6 present of a front face 14 of the bottle, preferably the whole Datamatrix code 6.
[0063]According to a second step, for at least one cavity, the width of the light strip 16 inscribed in said cavity is measured. By “width”, it is meant herein a dimension of the light strip along a direction parallel or substantially parallel to the axis of rotation 10 of the glass container 2. According to the present example, the width of the light strip is measured for the four cavities: YA, ...
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Abstract
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